свойства преобразование графиков функции
1) у=cosx+2
2)y=sin(x+П/3)
3)y=cos(x+П/3)
4)y=cos(x-П/4)
5)y=tgx

1- y=cos x-2
2- y=cos(x-П/4)
3- y=sin(x+П/6)
4- y=cos(x+п/3)

2. sint=3/5>0 0<t<П/2 cost>0 sin^2t=9/25  cos^2t=1-sin^2t=1-9/25=16/25  cost=4/5sin(t+П/6)=sintcosп/6+costsinП/6=sqrt(3)/2sint+cost*1/2=3sqrt(3)/10+4/10=(3√3+4)/10cos(П/2+t)=-sint=-3/51. √2cos(П/4-x)-cosx=1/2√2*(√2/2cosx+√2/2sinx)-cosx=1/2cosx+sinx-cosx=1/2sinx=1/2x=(-1)^kП/6+Пk